Merge "Allow more than one '=' in avb_extra_custom_image_extra_args." into rvc-dev

      partition, algorithm = a.split("=")

      OPTIONS.avb_algorithms[partition] = algorithm

    elif o == "--avb_extra_custom_image_extra_args":

      partition, extra_args = a.split("=")

      # Setting the maxsplit parameter to one, which will return a list with

      # two elements. e.g., the second '=' should not be splitted for

      # 'oem=--signing_helper_with_files=/tmp/avbsigner.sh'.

      partition, extra_args = a.split("=", 1)

      OPTIONS.avb_extra_args[partition] = extra_args

    else:

      return False